Multiple spindle boring machine



May 1932.

E. J. M KNIGHT MULTIPLE SPINDLE BORING MACHINE Filed July 15, 1930' 6 Sheets-Sheet l ig/z.

May 17, 1932'. E MCKM HT 1,858,677

MULTIPLE SPINDLE BORING MACHINE Filed July 15, 1950 6 sneets-sl et 2 1 gzag 23 231 23 2% 5 7 c Ira/67 702 6mm 6. M

May 17, MCKNIGHT MULTIPLE SPINDLE BORING MACHINE Filed July 15, 1950 6 sheets sheet s May 17, 1932. E. J. M KNIGHT MULTIPLE SPINDLE BORING MACHINE Filed July 15, 1930 6 Sheets-Sheet 4 y 1932- E. J. M KNIGHT MULTIPLE SPINDLE BORING MACHINE 6 heets-Shet 5 Filed July 15, 1930 filverl ior. Cum 2/ y 1932- E. J. M cKNIGHT V 1,858,677

MULTIPLE SPINDLE BORING MACH'INE Filed July 15, 1930 6 Sheets-Sheet 6 Inveniar: w 4- 4 Patented May 17, 1932 ELLIOTT J. MCKNIGH T, OF GARDNER, MASSACHUSETTS MULTIPLE SPINDLE BORIN MACHINE Application filed July 15 1930. Serial No. 468,174.

This invention relates to Woodworking machines and particularly to multiple spindle boring machines.

In the manufacture of furniture and, particularly, chairs, certain parts are required to have a relatively large number of dowel holes in different and angularly-related faces thereof. The back post of a chair, for instance, is required tohave a plurality of 'v 10 holes in two faces thereof to receive the chair rungs and dowels for attaching the chair seat, the back and the arms. The dowel holes in each face are required to be predetermined distances apart and the location of the dowel holes in the two faces are correlated. Some of the dowel holes are adapted to be perpendicular while others may be inclined to the face of the chair post. Multiple spindle boring machines that can bore a plurality of variously-inclined holes at one operation in one face only of a piece of stock, are common in the art. A chair post, as above described, can be bored in such a machine but it necessitates running the work twice through the machine, and two complete set-ups or adjustments of the machine, since the number and arrangement of the holes in the two faces of the stock are difierent. Some boring machines have been provided with two spindles held in unchanging angular relation for boring holes in angularly-related faces of a special piece of work but the holes can not be simultaneously bored and usually the stock has to be shifted in position between consecutive operations. Furthermore, such a machine cannot be adjusted to operate on various classesof work, and so has but a restricted use.

It is an object of'the present invention to provide an improved boring machine adapted to bore a plurality of holes simultaneously and automatically in two angularly-related faces of pieces of stock of a variety of shapes and dimensions with provision for boring each hole at any depth and angle desired so that the machine atone operation can form the complicated system of holes in the angularly related faces of such apiece of stock as a chair leg or post, thereby greatly increasing the output of a factory and reducing the unitexpense.

In the usual form of multiple spindle boring machines, the work is adapted to be held by hand in boring position, or, in some instances, it is held by a manually-operated clamp, or in other instances, by a springsupported pressure post carried by and movable with the bit spindle. An object of the present invention is the provision of a multiple spindle boring machine adapted to bore a plurality of holes'in angularly related faces of the stock and having power means operated independently of movements of the bit spindles arranged automatically to clamp the. stock when the machine is released for the boring operation.

In the usual multiple spindle boring machine, it is common to have'the bit-s sunk into and withdrawn fro-111 the stockby hand. It is an object of the present invention to have clutch-controlled, power-operated means for doing this work and so arranged that the depression and subsequent release of a control lever connects a continuously-operating motor with the carriages of the bit spindles to reciprocate them into and out of the work and thereupon disengages them automatically in withdrawn position from the motor.

It has been the general practice, heretofore, to drive the bit spindles of multiple spindle boring machines by belts. Since the holes are required to be bored in different locations and at different angles, the belt drive necessis tates either rapidly rotating universal oints between the bits and the driving pulleys, or 'a system of belting which permits the belt pulleysto be located in many angular positions, either of which requires a complicated mechanical; construction. It is an object of thepresent invention to drive each bit spindle by a'separate electric motor with the bit directly drivenby the motor shaft and to support the motor foradjustment into any one of various singularly-related positions, thus greatly simplifying the mechanical construction of themachine, eliminating the necessity for rapidly-rotating universal joints in the driving shafts of the bits, and providing abundant power for each bit and eliminating the necessity for rotating more bit spindles than may be actually required.

A further object of the invention is generally to improve the construction and operation of multiple spindle boring machines.

Fig. 1 is a perspective view of the multiple spindle boring machine embodying the present invention.

Figs. .2, 3 .and 4, are perspective views of various kinds of stock-adaptedto'beoperated upon by the machine of Fig. 1. g I

Fig. 5 is a plan view of the machine of Fi 1.

Fig. 6 is a partial front elevation of the rig t hand end of the machineo'f Fig. 1.

Fig. 7 is a sectional elevation taken along line 77 of Fig. 5. f i

Fig. 8 is. a rear view of a middle one of the horizontal line of gear boxes for reciprocating the horizontal bits and illustrating particularly the lock for the clutch of the shaft for reciprocating the horizontal motors and their hit spindles. V

Fig. 9 is a section alongline 99 of Fig. *8. Fig. 10 is a section taken along line 1010 of Fig. 6 and illustrating particularly the work-clamping mechanism.

Figs. 11 and 12 are end and side elevations -respectivel y .of one of the motor carriages for supporting a cluster of-bit spindles.

Fig. 13 is aneXploded view of the supporting mechanism for a verticalspindle-driving motor. 7

Fig. 14 is an exploded view ofthe supporting mechanism for ahorizontal spindle-driving motor.

Fig. 15 is a detail view ofone of the end motors showing the direct connection between the bit and the motor shaft.

, Fig. 16 is a detailed end elevation of the drivin and su ortin mechanisrn'for the end spindle.

The machine herein illustrated is adapted to bore holes indifferent pieces of stock having a large variety of shapes-some of which are illustrated in Figs. 2, 3 and 4. Figs. 2 and 3 illustrate the back legsor posts of different types of chairs and Fig. 4 illustrates a front leg of a chair. The work, however, is not confined to chairstock. The stock is not necessarily straight as the back'chair post A of Fig. 8 is bent so that the holes 13 in the top face of the stock are not in alignment. The holes C in the side face of the stock may be in alignment but, if they are of equal depth, necessitate a different setting for each bit since one part of .thework would ordinaril-ybe closerto a bit than another part of the work. The machinev has provision for boring of the holes simultaneously and for boring .each hole atany desired depth, angle or position in the stock, regardless of the other holes. I

The machine includes the supporting frame 20 having forwardly directed side brackets '22 which are rigidly connected by ahorizont-al beam 23 which supports a work-supporting with the length of the machine. The table- V brackets are supported for vertical adjustment in ways 26, one of which is shown in Fig. 1, so that the stock carried by the table can be positioned in proper location. with respect to the horizontal lineof bits. The table can be raised andilowered in any suitable manner by means including the shaft 28.

The beam 23 carries a plurality of independent vertical bit spindles which are in dependently driven by electric motors and areindependently adjustable lengthwise of the table .and in various angularly related planes and all are reciprocated vertically simultaneously.

Figs. 6, 7 and .13 illustrate 's-most olearly the construction of the supporting mechanism for .-a spindle, the supporting mechanisms Ebesing identical with :all of the spindles except that some driving motors may carry asingle bit and other driving imo'tors may tlmve :a cluster of bits.

As shown in the above figures, each spin-v dle supporting-mechanismiorbracket includes I the horizontal plate I which is disposed beneath the beam 23 and is slidable lengthwise thereof, on ways 32. Each bracket is independently movable lengthwise of :said beam by ascrew-threaded shaft .34 which is rotatably supported in the beam :23 against axial displacement thereoniand has ascrew thread- .edconnection with an ear 86 of the plate 130. Since there are four spindle supporting brackets here shown there are ifour screw shafts 34,, each connected with a separateone of said brackets and vtwo being sextended :beyond one end of the table and two bei-ngextended beyond the other-end of-tl1eitahle,-the ends vof two of said shafts being illustrated in Fig. 1. applying a suitable crank-to any one of the-extended ends of .said shafits,they can :be rotated to move the bracket connected therewith lengthwise of the "table. The bracket can .be locked in set position by the set screw 38. 1

V A plate 40 is located upon 'theilower face of plate 30 and is pivoted thereto at its rear end'by the pivot screw 42 so thatsaid plate 40 can he .moved in a horizontal ,plane [into anyone of variousangular positions with :re spect to the plate 30., whereby correspondingly to move the bit spindle. The plate 40 is locked in any angular setting thereof by a lock bolt 44 which is screw-threaded in the plate ,40 and operatesin an arcuate slot 46 in the .plate 30. The front face of the plate 40 bears *a witness line which registers 'witha series ;of angle ind-icia carried by the front face; of the plate 30 whereby to indicate the angular :setting of the p1ate40.

A third plate 48 is disposed beneath the plate 40 and is pivoted by "ahor-izontal shaft 50 to the rear end of said plate so that said plate 48 can be moved vertically into various angular positions. An arcuate ear 52 depends below the plate 40 and over a side face of the plate 48 and has an arcuate slot 54 therein in which a clamping bolt 56 is 10- '5 cated. Said bolt is screw threaded into forwardly and rearwardly. A screw thread- I ed shaft 62 is rotatable in said plate 48 and is fixed against axial displacement therein and has a screw threaded connection with said bracket whereby the bracket 60 can be moved horizontally along said plate 48 and hold it in any set position therein. Suitable indicia not herein shown are provided on adjacent faces of the bracket 60 and the plate 48 to indicate in inches the setting of said bracket 60 away from a normalposition on said plate. Thus, by moving said bracket 60 forwardly or rearwardly, the bit is moved correspondingly. The bracket 60 is provided with a vertically upstanding plate 64 against the rear face of which a vertical plate 66 is located, said plate constituting a supporting member for the carriage .of a driving motor of a vertical bit spindle. Said plate 66 is pivoted to the upper end of said bracket plate 64 by a pivot screw 68 so that said plate 66 can be moved an ularl in a vertical plane toward one end or the other of the work supporting table. Said plate. 66 is clamped in any angular setting thereof by a bolt 70 which is screw threaded thereinto and is loosely extended through an arcuate slot 72 in an arcuate ear 74 of said bracket 60. Suitable angle-indicating indiciaare provided between said ear 74 and the plate 66 to indicate the angular setting of said plate. Said plate 66 is provided with a vertical T slot 76 ex-' tending lengthwise thereof which constitutes a track in which the motor carriage 78 is re ciprocable. Said carriage consists essentially of a bar having extensions 80 atthe opposite sides thereof which are slidably located in said track 76. Said bar has a seat 82 on its rear face on which'an electric motor 84 is secured. the motor having a vertical shaft 86 that drives a bit 88. For some purposes, the motor is adapted to drive but a single bit in which case the bit can be secured in an axial recess of the motor shaft as is the case with an end motor of Fig. 5. In Fig. 7, however, the motor drives a cluster of bits. With this construction, the motor carriage 78 is provided at its upper end with pedestals 90 having bearings 92 therein in which three bit spindles 94, 96 and 98, respectively are rotatable, each spindle driving a bit 88. The spindles are geared together for conjoint rotation by the gears 100. The center spindle 98 is driven by the motor shaft 86 through a coupling 102. The number of bits in the cluster can be varied to suit specific requirement-s. r

WVith the supporting means for the motor as above described, it is apparent that the motor and the bit driven thereby can-be moved horizontally forward or rearward, or lengthwise, of the table, inclined in a vertical direction forwardly, inclined with respect to the median line of the table, and also moved about a vertical axis.

move its bit into and out of the work carried by the table by means of a cam cylinder 104 fixed to a vertical shaft 106 and located between and journalled in forwardly extending horizontal arms 108 of the carriage-supporting plate 66. Said cam cylinder is provided with an endless cam groove 110 in its periphery in'which a cam follower'or pin 112 is located. Said pin is carried by the motor carriage 78 and is connected witha block 114 which is located within and is adjustable lengthwise of a vertical guide slot 116 formed in the motor carriage 78. The position of the block 114 with respect to'the motor carriage is determined by an adjusting screw 118 which is rotatable in said carriage and is fixed against axial displacement therein and is screw threaded into said block. Thus, by varying the position of said block with respect to said carriage, the driving motor and the bit or bits associated therewith can be raised and lowered with re spect to the work carried by the table, there by providing for the boring of holes to different depths in the work, the stroke of the bit provided by the cam 110 being fixed. The cam is rotated by actuating mechanism which includes a horizontal drive shaft 120 located at the bottom of the machine beneath the table through an extensible and flexible driving connection. To this end, the cam shaft 106 has a pivotal connection 122 withthe upper end of a shaft 124, which shaft isslidable within and has a splinded driving connection with the tube 126. The bottom end The motor is reciprocated vertically to of said'tube has a pivotal connection 128 1 is extended lengthwise of the frame in the rear thereof andabove the rear beam 148 and serves to reciprocate the horizontal line of motors ina manner hereinafter to be described. The two shafts 146 and 120 rotate positively at the same speed.

" The horizontal motors 150 are. in general 8 identical with the vertical motors 84, and

either have bits 152 which are driven directlylxby the motor shafts 154, as is the case with .te end motors, Fig. 5. or drive a cluster of bits in the manner heretofore described. The supporting mechanism or brackets for each'motor and the reciprocating mechanism thereof are identical and so but one need be described. 7

The motor 150 is fixed to a horizontal carriage 156 which is horizontally reciprocable :in :ears of a horizontal carriage supporting plate 158. whichplaterests upon the upper horizontal plate'1-60 forming part of a supporting bracket and is pivoted to the front end thereof by a pivot pin 162. Said plate is provided with a laterally horizontally extended .ear 164 having an arcuate slot 166 therein through which a clamping bolt 168 is extended wherebyithe'plate 15'8-can be secured in'anyangular setting thereof. Said bracket has avertically depending plate or slide 170 which is vertically slidably received in ways of a hinged member 172. Said bracket can be raised and lowered vertically in said hinged member by. means of an adiusting screw 174 which is rotatable in said hinged member and is fixed against axial displacement therein and is screw-threaded in said slide 170. The hinged member 172 is pivoted at its forward end on 'a horizontal shaft 176 which is carried by a supporting plate 180. Said member 17 2 can be raised and lowered vertically about its shaft 17 6 into any debeneath the table, and has ways 1-91 on which said :plate is movable lengthwise whereby to move the :motor carried by it intoa-ny desired is provided with an independent screw shaft 192 so that each motor can be moved horizontally independent of all other :motors. Each motor is reciprocated horizontally means of a cam cylinder 194 which is fixed to a shaft 196 journ'alled in the plate 158.

The camcylinder is provided with an endless peripheral camgroove 198 .in *whicha cam pin 200 is received. Said cam pin is connected with the motor carriage156ibut'is adjust'ably located in a slot 202 thereofsso that 'the motor can be moved forwardly or rearWardly-by changing the position of the pin in the'islot and reciprocating it in any set position, thereby to vary the depth of thehole bored by the motor. The motor is reciprocated from the shaft 146 by means including the universal joints 204 and 206 and the interposed telescoping driving connection 208 which is constructed as has been previously described in connection with the vertical motors. The shaft 208' of the universal joint 206 is journalled in a gear housing .210 and has a worm gear 212 thereon which'is in mesh with a worm 214 rotatably :fixed to and slidable axially on :theshaft 146. The gear =hous-, ing 210 is carried by' the beam 148 and can be moved into any desired position lengthwise of said beam and secured in said position by means "of bolts 216., the headsiof which are located in a T-slot 218 which :is extended lengthwise of the beam. As thus arranged, the motors can be moved horizontally into any desired position with respect to the work :table and the driving gears therefor can be moved into line therewithlor, if not into line,

into some suitable location with respect thereto so as to reduce the angularity of the motor reciprocating driving connections.

All of the horizontal and vertical line of motors are reciprocated simultaneously by means including the electric motor220 which is supported on a bracket of the frame 20. Said motor is -maintained'continuously in operation and drives through a cha-int222 one element of a clutch mechanism-z224 "which is rotatable on the shaft 146. Said-element is clutched :to the shaft 146 by operating mechanism which includes the cone 226 which, when moved to the left, Fig. 5, sets. the clutch and connects the motor to the shaft 146 and when moved in the opposite direction frees the motor from the shaft. The cone'226 is moved axially of the shaft by means of .a bifurcated arm 228thatis fixed to an axially. movable shaft .230 which is 'slidable I in-Lbearing brackets 232 carried by the beam 148. A coil compression spring 234 encircles said shaft and bears thereagainst and also against one of the brackets to urge said shaft and cone constantially in a clutch-free position.- The shaft is moved axially toward. the left into a clutch-setting position by means of a pedal 236 which is pivotally supported at the front of the machine beneath the table and is held yieldingly in elevated or unoperated position by the spring 238. A flexible cable 240 extends from said pedal over guide sheaves 242 to one arm 244 of abell crank lever which is pivoted on a vertical pin 246 carried by the beam 148. The other arm 248 of said lever has an operative connection with the shaft 230 so that when said pedal is depressed, said shaft is moved to the left tov set the clutch and effect the reciprocatory movement of all of the motors simultaneously. When the pedal is released, the spring 234 automatically moves the shaft in the opposite direction and disconnects the driving and driven members of the clutch. Means are provided to hold the shaft 130 in clutch-set position for one complete cycle of reciprocatory movement of the spindle-motors and then. to disengage the clutch whereby to stop the reciprocatory movement with the motors in withdrawnposition. To this end, a locking pin 250, see especially Figs. 8 and 9, is vertically slidably received in ways 25 2 of one of the middle gear housings 210. A rod 254is connected with and extends downwardly from said key and is slidable through. a bracket 256 carried by the beam 148. A collar 25.8'is fixed to said rod and a compression: spring 260 encircles said rod and bears against the collar and against said bracket whereby to urge said key upwardly. JWhen said shaft 230 is in clutch-disengaged position, it is lo-v cated above said key and thereby holds it in depressed position. When said shaft is moved into a'clutch-setting position, however, it moves horizontally away from said key, thereby permitting. the key to move upwardly under influence of said spring 260 into the path of movement of the shaft, there.- by holding the clutch set. i The key is depressed automatically at the end of each complete reciprocatory movement of the spindlemotors by a cam 262 which is fixed tothe end of the middlegear shaft208 and has a cam projection 264 which is rotatable into and out of engagement with a cam projection 266 carried by said key. Thus, when said cam projection 264 engages and depresses thekey, it permits the clutch to become disengaged and thereby stops the reciprocatory movement of the motors with the motors in extreme withdrawn position. Sincetthecam is in engagement with the key for but a short portion of a complete revolution, the depression and immediate release of the treadle 236 is suflicient to effect one complete reciproca tory movement of the motors to move the bits driven by them into and out of the work carried by the work table 24. The work table has a longitudinally-extendedopening 268 which is of substantial can be moved into any desired position lengthwise of the table and are held against transverse movement under urge of the stock that is acted upon by thehorizontal line of bits. Plates 27 6 are received on the upper faces of said work supports at the rear ends thereof and constitute back-stop members against. whichthe work A is placed to define the operative position thereof with respect to the bits. Sa1d plates have longitudinal slots therein in which bolts 278, screw-threadedin said bars 270, are received, whereby to secure the stop-members in any adjustedposition lengthwise of the bars, An end-stop member comprising a bar 280 overlies the work table and is, adapted to be engaged'by'one end of the work so that theholes in duplicate pieces of work will-all be bored in the same position from this end of the work. Said bar 280 is longitudinally adjustable in a bracket 282 which is slidable in a longitudinal T- shaped groove 284 in the rear edge of the table andis clamped in any adjusted position thereon by the bolt 286, the head of which is located in said groove.

Means are provided to clamp the work upon the work supporting bars 270 at a plurality of changeable locations along the length of the work. Said means includes an eccentric clamping shaft 290 which is j located horizontally above the Work-support ing table and is journalled in bearings'292- which are vertically adjustable in brackets 294 fixed to the front face of a horizontal top beam 296 carried by the frame of the machine above and behind the table. A plurality of horizontal clamping feet v298 are received loosely on said shaft and overlie the table.

Said clamping feet are adjustable lengthwise of the'shaft and are secured loosely thereto against unintentional axial displacement by means of screws 300, the ends of which can be loc'atedin anyone of a pluralit of peripher al grooves 302 in said shaft. verticalarms 304 that are provided with vertically adjustable fulcrum screws306 the lower. ends of which bear upon a forwardly extendedfiange 308 ofsaidbeam 296. The op-,, posite ends 310 of-said-shaft and those pore aid feet have tions thereof that are rotatably supported by isrontrolled bythe motor reciprocating:

mechanism; To'this end, an arm 3 16 is fixed to one'end of the shaft and has a camroller SIS-thereon which is adapted to be engaged and releasedbyv a rotatable cam lOl e 320. Saidlpbe is fixedto a shaft 322 which is journalled'at its forwardvend in abracket 324:

-fixed to the top beam 296 and at its rear end in a bracket 326' carried by and upstanding above the rear beam 148. Said'shaf-t-is driven from the shaft 146 by worm" gears identical with those which reciprocate the horizontal line of motorsand enclosed in a gear housing 328which is carried by the beam 148. The driving shaft 3300f said housing has a driv-' ingj connection with the" shaft? 322 by means of a drivingfchain- 332' which. rotates said shaft at the speed ofthe Shaft 330'; The arrangement of the cam lobe 320 and the arm 316 is such that when the mechanism. is st-a,- ti onary i'n'the 'withd rawnposition of the motors; the cam lobe engagesthe arm" 316 and depresses-itand'thufs holds the shaft; from r0 tati on 'under urge of its springs. 'When the t'readle isde'presse'd, and the motors begin to move toward the work; the cam lobe 3'20 moves away; from holding relation with the arm 3l61a nd thus permitsthe springs 312 to 'Eotate the shaft and: thereby to move the work clamping feet 298 into holding engagement' with: the work, this clam-ping operation being-efltectedbefore the bits engage the work.

The cam is arranged to engage and depress he lever 316 and thus remove the clamping pressure on the work just prior to the movementofjthe motors into their final withdrawn positions f The pressure feet can be adjusted toengage stock'of various thicknesses. by a pr-oper setting. ofthe fulcrum screws 306. so thatsome feet can engage thick portions of thesteck and. other feet thin-portions. of the stockwhen said stockisof a non-symmetrical shape as, for instance, like thati-llustratedin Fig; 4. a Y

"One end otthe extended be yondi the frame of the" machine and is pro,-

vided j with a. coupling member 334pthatri's, adapted tube engaged. by'a detachable. crank so: that the motor. 1 reciprocating mechanism can-be actuatediby handzfor adjusting the mar;

chine- -tooperate on some selected shape: of stock. 7 I Q The machine is also provided: with a bit driven through reduction gearing hyamotor 338 for boring holes in one end of thework. The motor is reciprocable horizontally over the table-in the-manner-previously described by means including an operating shaft 340 which isconnected through extension-geai ing with theend' gearbox 132 for operation by the shaft 120, thus being operated simultaneously with the vertical line of motors. The motor is reciprocable by theusual cam mechanism in a plate 344, see especially Fig. 1 6', which is angularl y adj'ust ably carriedin a bracket 346thagt is pivoted; for hori zontal sw ngingmovement on a plate: 348 slidableforwardly and rearwardly in a )late 3'50-that is movable in ways lengthwise of the; table, thus providing-'the-necessary angular and linear adjustments. Themachine can be provided with a similar motor and supporting" and operating mechanism at the other end.-oftheta;ble-,if desired, in-an obvious manner not necessary to'illustrate and, in such case; theend stop 280will be soadjusted' that it can be engaged by thestockina location-which out ofthe line of the bit.

Each motor-is independently started" and stopped by controtpush buttons contained in -a casing 352 carried' by the top beam 296, see

Fig. 1 and located n position convenient to access-by an operative. Flexible-electric cables, not shown, serve to connect the movable electric motors through protective switches with a power circuit. 7

I I claim:

1. A multiple spindle boring machine havi-ng'a stationary work supporting; table, a plurality ofb t spindle carriages reciprocable toward and away-from. said table, a separate tilting support for each spind'lecarriage, individual mean-s associated witheach bit s indle carriage and carried by the tilting support therefor arranged t'o reciprocate the'carriage. and common actuat ng means for all of said reciprocatingmeans separate from said tilting supports and operating continuallv in'the same direction; 4

2 A multiple spin dleboring machine having a stationary work supporting table, a plurality, of. b t spindle carriages reciprocable towardv and away fromsaidtable. a separate tilting support forfeach spindle carriage, in.- dividualmeans associated with: each bitspindle carriage and carried by the tilting sup? port; theretorto reciprocate the carriage. and

common act-natingmeans vfor all of said; re

ciprocatingmeans separate from said tilting same direction including. universal and ex- 7 tensible driving 1 connections. individually connecting each, reciprocating means with saidacommonlactuating meanswh re yzto n erate said reciprocating means in any adjusted positions of said tilting supports.

' 3. A multiple spindle boring machine having a stationary work supporting table, a plurality of bit spindle carriages which are reciprocable toward and away from the work on said table, a separate tilting support for each carriage, individual cam means carried by the respective supports for reciprocating said carriages, and common actuating means for all of said cam means operating cont-inn ally in the same direction. 7

4. A multiple spindle boring machine hav ing a stationary work supporting table, a

I plural ty of bit spindle carriages which are reciprocable tow rd and away from the work on said table, a separate tilting support for each carriage, individual cam means carried by the respective supports for reciprocating said carriages, common actuating means for all of said cam means, operating continually in the same ClIQClZlOIl, and universal driving connections separately connectlng said cam means with said common actuating means;

- 5. A multiple spindle boring machine hav ing a work supporting table, a set of vertically reciprocable bit spindles having ind vidual electric driving motors therefor, a setof horizontally reciprocable bit spindles having individual electric driv ng motors therefor. means to reciprocate each bit spindle and its driving motor separately toward and away from the work on said table, poweractuated driving mechanism common to all of said reciprocating means for actuating them simultaneously in the same sense, manually controlled means for initiating the action of said power-actuating mechanism, and means operated in timed relation with the reciprocatory movement of a selected one of said b t spindles for discontinuing the operation of said power actuated mechanism.

6. A multiple spindle boring machine having a work supporting table, a plurality of bit spindles reciprocable toward and away from the work on said table, actuating mechanism for reciprocating said spindles simultaneously in the same direction, means" to clamp the work on said table includingan ec centric shaft, a plurality of clampinglevers loosely mounted on said shaft and having fulcrum supports therefor, spring means constantly urging said shaft for rotation in a direction to urge said clamping members against the work on said table, and means operated in timed relation to the reclprocatory movements of said bit spindles for control ling the operation of said spring means.

7'. A multiple spindle boring machine havng a work supporting table, a plurality of bit spindles reciprocable toward and away from the work on said table, actuating mechanism for reciprocating said spindles simultaneously in the same direction, means to clamp the work onsaid table including an ec-:

against the work on said table, and means operated in timed relation to the reciprocatory movements of said bit spindles for'holding said shaft against-rotation and also for re leasing said shaft for rotation and additionally for rotating said shaft against said spring means to effect the release of said clamping members.

8. A multiple spindle boring machine having a work supporting table, a plurality of bit spindles reciprocable toward and away from the work on said table, actuating mechanism for reciprocating said spindles simultaneously in the same direction, means to clamp the work on said table including an eccentric shaft, a plurality of clamping levers loosely mounted on said shaft and having fulcrum supports therefor, spring means constantly urging said shaft for rotation in a'direction to urge said clamping members against the work on said table, andmeans operated'in timed relation to the reciprocatory movements of said bit spindles for holding said shaft against rotation and also for releasing said shaft for rotation and additionally for rotating said shaft against said spring means to effect the release of said clamping members. said last-named means including an arm fixed to said shaft and a cam engageable with said arm having rotating means therefor actuated by said actuating mechanism. 9; A multiple spindle boring machine having a vertically-adjustable work supporting table, a bit spindle supporting beam fixed to and located beneath and extended lengthwise of and movable with said table, a bracket carried by and movable lengthwise of said beam, and having means for holding it in any one of a plurality of angularly relatedv positions with respect .to said beam, an elec tric driving motor having a bit spindle vertically reciprocable 011 said bracket, and means to reciprocate said motor andspindle toward and away from the work on said table in any setting of said bracket and also of said table.

10. In amultiple spindle boring machine, the combination of a stationary work supporting table, a spindle supporting beam extended lengthwise of said table, a supporting and reciprocable on said carriage supporting member toward and: away fromithe Work on said table, an, electric driving motor and; bit spindle carried by and movable with said carriage, meanscarriedby said carriage supporting member for'reciprocating'said carriage, stationarily-supported means operating-continually in the same direction. for actuating said reciprocating means, and a flexible. andextensible driving connection con necting said: reciprocating means and said actuating means'i'n; any angular position of said carriage supporting member.

11. In a multiple spindle boring machine, a stationary work supporting, table-,an elec tric driving motor having a bit. spindle, a carriage supporting said motorand spindle, a zcarriagesupporting plate on which said carriage is reoiprocable toward; and a 'ay from said stationary table, a-isupporting' beam extended lengthwise of saidtable, means connecting' said carriage supporting plate with said beam having mechanism providing for the angular-movement of said carriage sup porting; plate in two angularly-rel ated' planes and" also for the movement of said plate lengthwise and: also transversely of said beam, and means forreciprocating said carriage in any adjusted position of'said carriage supporting; plat-e1 1'2. In a" multiple spindle boringmachine,- a; work supporting table, an electric driving motorhavi'ng a: bit spindle,-

carriage supporting; said motorand spindle, a carriage supporting plate on'which' said carriage is reciprocable toward and away from said table, azsupportingbeam extended lengthwise of said table, means connec ting. said: carriage supporting; plate with said beamv having mechanism a providing; for. the angular movementiof said carriage supporting; plate in two angularlyi-related planes and also fhr the movement otsaid plate lengthwise and also transverse'lyof saidheam, means carriedby. aidcarriage supporting'plate for. reciprocating said carriage, stationarilyssupported actuating mechanism for said reciprocating means, and a flexible and extensible driving mechanism connecting said, reciprocating Lneans and said actuating means.

13. Ina multiple spindle boring machine, a stationary workflsupporting table, a' beam extended lengthwise of said table, a supporting plate carried by and'sli'dable lengthwise of said beam a bracket having means con? necting it. for pivotal movement with said plate and. also for movement: transversely of said beam, a. carriage supporting plate -h avng apivotal connection with said bracl-zet at-right. anglestothe pivotal connection between said-bracket and supporting platea carriage slidable in said carriage supporting? 7 plate, a motorand. bit spindlecarri ed @by said carriage and movable therewith and means to reciprocatesaidcarriage: toward and away from said work supporting: table.

14. In; a multiple spindle boring" machine, a work supporting table, a beam. extended? lengthwise of 'said: table, a supporting plate carried: by. and slidable lengthwise of said. beam, an intermediateplate carried by said supporting. plate and having a vertical pivo tal connection therewithaaahottom plate. hav

ing a horizontal" pivotal connection; with: said intermediate plate; a' bracketcarried by said bottom plate and having a horizontally sliding. engagement therewith, a carriage supporting member-carried; by said: bracket and having a horizontalpivotal connection there:- with which is at right angleswithi the aforesaid pivotal connections, a carriage carried by and reciprocable onasaidcarriagesupporting member,- an electric-'motor'and bit spindle. carried by and: reciprocablewith" said: can-- riage, andmeans to reciprocate saidcarriage toward and away froms-aid table'in anysetting of the aforesaid parts.

15.- In a multiple spindle boring machine, a work supporting table, a beam; extended lengthwise of: said table, a' supporting plate carried by and slidable lengthwise of said: beam, an intermediateplate carried by said supporting plate andhaving a vertical'pivote alconnection therewith; a bottom: plate-having a horizontal pivotal: connection with said intermediate plate, abracket carried: bys'aiid bottom plate and having; a horizontally 's-l-id" ing engagement therewith, a' carriage sup-- porting: member-carried by" said bracket and. having; a horizontal'pivotal connection therewith which is at right angles with the; afore=- said pivotalconnections, acarriage carried byr and reciprocable onsaid carriage supporting member, an electric driving motor: and bit spindle carried by and" reciprocab'le? with said carriage, a rotatable cam. membercarried by said carriage supporting" member" having means connecting it with said" carriage for reciprocating the latter, stationarily-supported: driving means fbnrotating'said cam member, and flexible and extensible: driving-connection which connects said cam mem= her and said: stational'ilysup'portedr driving. 5

means.

16;. In a multiple; spindle boring machine, the combination: ofa worltsupporting table, an angularly adjiistable carriage supporting member, means supportingsaid carriage supporting' member fixedly in any-one ofvarious' 12o carriage supporting member and operating continually in the same direction for operating said carriage reciprocating means.

17. In a multiple spindle boring machine, the combination of a work supporting table, an angularly-adjustable carriage supporting member, means supporting said carriage fixedly in any one of various angular positions, a carriage reciprocable on said carriage supporting member toward and away from said table, a bit spindle rotatably supported by said carriage, means carried by said carriage supporting member for reciprocating said carriage and said bit spindle toward and away from the work on said table in any angular setting of said carriage supporting member including a cam member having a rotatable support on said carriage supporting member, a cam follower carried by said carriage and operated by said cam member, stationarily-supported driving means for said cam member, and an extensible and flexible driving connection which constantly connects said cam member and said driving means.

18. In a multiple spindle boring machine, the combination of a work supporting table, a carriage supporting member, means supporting said carriage supporting member in any one of several angularly-related positions lengthwise of said table, a carriage reciprocable on said carriage supporting member toward and away from said table, a bit spindle having a rotatable support on said carriage, means carried by said carriage supporting member for reciprocating said carriage, stationarily-supported driving means for said reciprocating means which is movable into any one of a number of positions longitudinally of said table, and a flexible and extensible driving connection which connects said reciprocating means and said driving means.

19. In a multiple spindle boring machine, the combination of a work supporting table, a carriage supporting member having means fixedly supporting it in any one of a plurality of angularly-related positions, a carriage reciprocable on said carriage supporting member toward and away from said table, a bit spindle having a rotating support on said carriage, and means for reciprocating said carriage including a cam member having a rotatable support on said carriage supporting member, a cam follower having means connecting it fixedly in any one of a plurality of positions disposed lengthwise of said carriage, and stationarily-supported means for rotating said cam member.

20. In a multiple spindle boring machine, the combination of a work supporting table, a spindle supporting beam extended lengthwise of said table, a carriage supporting member having means connecting it with said beam for movement longitudinally thereof and also for supporting it in any one of various singularly-related positions, a carriage reciprocable on said carriage supporting member toward and away from said table, a

bit spindle having arotatable supporton said carriage, cam means carried by said carriage supporting member for reciprocating said carriage, and means to rotate'said cam means including a stationarily-supported driving shaft extended lengthwise of said table, mesh: ing driving and driven gears rotated by said driving shaft and movable lengthwise thereof while maintaining their operativeconnection therewith, and a flexible and extensible driving connection which connects said cam means n and said driven gear.

I 21. In a multiple spindle boring machine, the combination of a worksupporting table, a carriage having means supporting it for reciprocating movement toward and away from said table, a bit spindle having a rotatable-support on said carriage, means for reciprocating said carriage including a driving shaft, the angular position of which corresponds to'the reciprocated position of saidcarriage, an actuating shaft having a driving connection With said driving shaft, 'contin uouslyoperating driving means having aclutching connection wlth said actuating shaft, manually operated means to set the table,

ice

ly operated power mechanism having means including a clutch for connecting said mecha-' nism and actuating shaft, an operatingmem ber including a shaft slidable in one 'direc tion to set the clutch, andslidable in the opposite direction to release the clutch, manually controlled means to move said sliding shaft in a clutch setting position, a' latch member 'engageable with said shaft in the clutch setting position thereofto holdit in such position, spring .means to'move' said sliding shaft in a clutch release direction, and a cam member driven by said drive'shaft' for moving said latch out of engagement with said sliding shaft and effecting the re lease of said clutch in a predetermined position of said carriage. V

23; In a multiple spindle boring machine, the combination of a stationary table having an opening extendedlongitudinally thereof,

a plurality of bit spindles Vertically reciprocable beneath said table under said opening,

a plurality of bit spindles horizontally reoiprocable over said table, and a plurality of Work supporting bars extended transversely over said opening and having a sliding connection with said table lengthwise thereof and transversely of the reciprocating paths of said horizontal spindles, and clamping members adjustable for position lengthwise of said table and located above said bars for holding down. said bars and the workthereon against the action of said vertically reciprocable spindles. j

24. In a multiple spindle boring machine, the combination of a work supporting table having an opening extended longitudinally. thereof, parallel groovesextended lengthwise of said table on opposite sidesof said opening', a, plurality of work supporting bars extended transversely across said opening having depending projections which are slidably received in said grooves whereby to guide said bars for sliding movement lengthwise of said table, work clamping members located above said bars, a plurality of vertically reciprocable bit spindles located beneath said table, and said opening, and a plurality of horizontally reciprocable spindles located above said table and said work supporting bars. 7 r v 25. A boring machine having a stationary work-supporting table, a bit spindle reciprocable toward and away from said table, a tilting support for said spindle, means carried-by and movable with said tiltin support for reciprocating said spindle, an stationa-rily-supported actuating means independent of said tilting support andoperating continually in the samedirection for operating said re'ciprocating'means.

26. A spindle boring machine having a work-supporting table that is adjustable into any one of several vertical positions, workclampi-ng'means located above said table and supported independently thereof for clamping the work thereon, a bit spindle located vertically beneath and movable therewith, a

vertically-reciprocable support for said spindle carried by and movable with said table, and means for reciprocating saidsupport including a drive shaft supported independently of said table, and a support-reciprocati-ng shaft extended between said drive shaft and support and having an operative connectiontherewith in any position of said table.

In testimony whereof, I have signed my name tovthis specification. V v

ELLIOTT -J. 'MoKNIGH-T. I

ame-17 

